This seems like a proposal bet or perhaps a joke to me rather than selling playmoney (that doesn't make much sense, to be selling play money). If you would be nice enough to provide the thread this is copied from, I can give you further information on what that means
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you can buy and sell playmoney chips from all the major poker sites, just google it. Pokerstars chips go for $10 per million, Im not sure what price you get for FTP or Party chips. Its a good way to restart if you lose your starting capital here
Playmoney chips at Stars have theoretical value of 1c per thousand and are ridiculously easy to accumulate.